package com.engine.cn.juc;

import java.util.concurrent.ConcurrentHashMap;

public class Test {
    public static void test1() {
        ConcurrentHashMap<String, String> concurrent = new ConcurrentHashMap<>();
        concurrent.put("key", "value");
        System.out.println(concurrent);
    }

    public static void main(String[] args) {
        test1();
    }
}
